39 lines
1 KiB
Ruby
39 lines
1 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Jekyll
|
|
module Utils
|
|
module Internet
|
|
|
|
# Public: Determine whether the present device has a connection to
|
|
# the Internet. This allows plugin writers which require the outside
|
|
# world to have a neat fallback mechanism for offline building.
|
|
#
|
|
# Example:
|
|
# if Internet.connected?
|
|
# Typhoeus.get("https://pages.github.com/versions.json")
|
|
# else
|
|
# Jekyll.logger.warn "Warning:", "Version check has been disabled."
|
|
# Jekyll.logger.warn "", "Connect to the Internet to enable it."
|
|
# nil
|
|
# end
|
|
#
|
|
# Returns true if a DNS call can successfully be made, or false if not.
|
|
module_function
|
|
def connected?
|
|
!dns("example.com").nil?
|
|
end
|
|
|
|
private
|
|
module_function
|
|
def dns(domain)
|
|
require "resolv"
|
|
Resolv::DNS.open do |resolver|
|
|
resolver.getaddress(domain)
|
|
end
|
|
rescue Resolv::ResolvError, Resolv::ResolvTimeout
|
|
nil
|
|
end
|
|
|
|
end
|
|
end
|
|
end
|